I aimed for a ghost, non lethal mission and didn't make non lethal - I suspect a guard I left perched on a railing out of sight of the window at the Cat must have fallen off.
The other act that may have affected the outcome was opening the Art Dealers safe to get the rune - I closed the safe on my way out and understood that going in there would not affect the deal - perhaps I was wrong
Anyway could someone advise is Pendleton meant to sound disappointed and talk of you killing the twins when you haven't, is the speech bugged or is there something I've done wrong ?